Improved cab-coupling



@eine rates atwt @Hirn EDWIN R. Bre-snow', oF SALEM, MASSAGIHUSET'IS.

Letters Patent No. 72,717, dated December 31, 1867 IMPROVEE GAR-COUPLING.

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TO ALL PERSONS T0 WHOM THESE PRESENTS MAY'COME:

Be it known that I, EDWIN R. BIGELOW, of Salem, in the county of Essex, and State of' Massachusetts,

have-invented an Improved Railway-Carriage Coupling; -and do hereby declare the same to be fully described in the following specification, and represented in the 'accompanying drawings, of" which- Figurc 1 is a top view, Figure 2 a side elevation, Figure 3 a vertical and longitudinal section ot`- a draw-bar provided with my said coupling, and Figure 4 a horizontal-and longitudinal section ot' the same. In such drawings, A denotes the draw-bar provided with a llaring or trumpet mouth, a, and with a hole, Z) b', the latter being for the reception ot' thelink-connection pin B. Within the chamber ol of the draw-bar is a heavy bent lever or tumbler, C, through the upper part of which a rod, e, is earried,vsuch rod being extended through vertical slots,d, made in the opposite sides of the draw-bar. v The tumbler C is arranged between two sto'ps or abutments e 'e projecting from opposite sides of the chamber d of the draw-bar, they being arranged therein inmanner as represented. In,v rear ofthe pin-passage, and through the upper part of the draw-bar, is an opening' or passage,f, to enable the tumbler to rise or be thrown into the position as exhibited at C by dotted lines. When the tumbler is in aihorizontal position, and down upon the' bottom of the chamber cl, the pin B (in the'holes b) will: rest on the top of the tumbler. When `the link D is being driven into the draw-bar it will strike against thetnmbler and throwiit up into the position indicated by the dotted lines, so as to force it away from underneath the pin B, and 'allow the said pin, by its gravity, to fall down into the link and the hole b, and so as to connect the link to the'draw-bar. The end of the link will bring up against the abutments,

by which, and the pinand tumbler, 'the link will beheld horizontal, or-thereabouts, particularly while thelink is being driven into another draw-bar for being coupled thereto. i I n From the above it will bo observed that the tumbler, while being thrown up by the link, will not only revolve on its fulcrnm, but both it and the fulcrm-rodwill be raised vertically, so as to enable` the link to pass underneath the tumbler. Thus, in its movement, caused by the link, the tumbler has a compound motionimparted to it, composed of avertical motion and a rotary one, such being highly favorable for the movement of the tumbler from underneath the pin and backward with the link,so that the latter may pass under the tumbler. On removing the link..from the draw-bar, the tumbler, owing to the weight of its longer/arm, will fall down upon the bottom of the'chamber d. g

I am aware that it is not new to apply a tumbler to a draw-bar and its pin-passage,v and therefore' I make no claim thereto.l When a tumbler has been so applied, it generally, when in operation, has turned on aeentreor axiswith a circular motion only, and neverwith a compound motion, consisting of such a circular motion and a vertical motion, such as the tumblerof my improve-d car-coupling has while either rising or falling. Furthermore, it will be seen'that the axis of motion of my tumbler is arranged a little `below the part on which the pin is supported when the tumbler is in its lowest position, and that the tumbler,'whilo rising, passes up through the passagef, and extends out-ot` and above the dr aw-bar in manner as represented by dotted lines in g. 3; also, that the tumblervhile supporting the pin, rests flatly upon the bottom ot' the chamber d,-so as to prevent the pin from accidentally falling away from thetumbler. l i

The aboveldescribed compound motion of the tumbler is to enable the front end of-the tumbler to rise on the link while the tumbler is being revolved by the link. Thetslots d' allow Athe tumbler to adjust itself to andl fall'upon the link, whatever maybe its thickness, `as links, as commonly used,rvary in their thickness.

My tumbler is not arranged in the Haring mouth of the draw-bar, but in a chamber, d, disposed in rear thereof, the tumbler, while rising, passing up through the top of such chamber.

What I claim as my inventionlor improvement, is

The arrangement and combination of the openingfin the top of the draw-bar chamber with the tumbler, Amade substantially in manner, and arranged in rear of the mouth of thedraw-bar, and applied thereto, so as to operatewith a compound motion, as specifried. i

I also claim tho arrangement of thejournals or pin of the tumbler, so as to be below that part ot' the tumbler which supports the pin when the tumbler is in its lowest position, in combination with vertical slots d made in the sides of the chamber d of the draw-bar, the tumbler being formed substantially as represented.-

I also claim ,the arrangement as well as the combination of the abutments, or their equivalent, with the draw-bar, and with the tumbler applied thereto, so as to operate with a compound motion, as and under circumstances substantiallyias hereinbefore set forth. I

EDWINl It. BIGELOW.

Witnesses R. H. EDDY, F. P. HALE, Jr. 

